print out current OSD capacities and usage if no suitable OSD can be found for a new folder<

xtreemfs_client/dataDistribution.py

@@ -120,6 +120,12 @@ class DataDistribution(object):
             total_bandwidth += one_osd.bandwidth
         return total_bandwidth
 
+    def get_total_capacity(self):
+        total_capacity = 0
+        for one_osd in self.OSDs.values():
+            total_capacity += one_osd.capacity
+        return total_capacity
+
     def get_average_folder_size(self):
         """
         get the average folder size of all folders of all OSDs.
@@ -474,7 +480,10 @@ class DataDistribution(object):
         for one_osd in self.OSDs.values():
             if one_osd.capacity - one_osd.total_folder_size - folder_size >= 0:
                 suitable_osds.append(one_osd)
-
+        if len(suitable_osds) == 0:
+            print("no suitable OSD found!")
+            print("total OSD capacity: " + str(self.get_total_capacity()))
+            print("current total folder size: " + str(self.get_total_folder_size()))
         return suitable_osds
 
     def get_lpt_osd(self, folder_size):